left-handed

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Using the left hand more skillfully or easily than the right.
• adjective Sports Swinging from left to right.
• adjective Done with the left hand.
• adjective Intended for wear on or use by the left hand.
• adjective Awkward; maladroit.
• adjective Of doubtful sincerity; dubious.
• adjective Of, relating to, or born of a morganatic marriage.
• adjective Turning or spiraling from right to left; counterclockwise.
• adjective Rotating counterclockwise; levorotatory.
• adverb With the left hand.
• adverb Sports From the left to the right.

from The Century Dictionary.

• Having the left hand or arm stronger and more capable of being used with facility than the right; using the left hand and arm in preference to the right.
• Characterized by direction or position toward the left hand; moving from right to left: as, a left-handed quartz crystal (one which rotates the plane of polarization to the left). See levogyrate and polarization.
• Clumsy; awkward; inexpert; unskilful.
• Insincere; sinister; malicious.
• Unlucky; inauspicious.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Having the left hand or arm stronger and more dexterous than the right; using the left hand and arm with more dexterity than the right.
• adjective Clumsy; awkward; unlucky; insincere; sinister; malicious.
• adjective Having a direction contrary to that of the hands of a watch when seen in front; -- said of a twist, a rotary motion, etc., looked at from a given direction.
• adjective a morganatic marriage. See Morganatic.
• adjective a screw constructed to advance away from the observer, when turned, as in a nut, with a left-handed rotation. An ordinary wood screw is right-handed.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Of or pertaining to one who uses his or her left hand in preference to, or more skillfully than, his or her right.
• adjective Intended to be worn on, or used by, the left hand.
• adjective Turning or spiraling from right to left; anticlockwise.
• adjective Awkward or maladroit.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective ironically ambiguous
• adjective lacking physical movement skills, especially with the hands
• adjective rotating to the left
• adjective (of marriages) of a marriage between one of royal or noble birth and one of lower rank; valid but with the understanding that the rank of the inferior remains unchanged and offspring do not succeed to titles or property of the superior
• adjective using or intended for the left hand
• adjective (of marriages) illicit or informal